diff -r 9172bd97ae99 -r 6f15f18d2abf src/XattrAttributeFinder.h
--- a/src/XattrAttributeFinder.h	Mon Nov 11 14:42:13 2019 +0100
+++ b/src/XattrAttributeFinder.h	Sat Jan 11 00:56:51 2020 +0100
@@ -62,7 +62,7 @@
 
 public:
 
-	virtual vector<AttributeMetadata> toMetadata(const RequestedField& field) override {
+	virtual vector<AttributeMetadata> toMetadata(RelationalWriter* writer, const RequestedField& field) override {
 		if (field.group == RequestedField::GROUP_XATTR) {
 			vector<AttributeMetadata> metadata;
 			for (string_t alias : field.getAliases()) metadata.push_back(AttributeMetadata{alias, TypeId::STRING});